Vehicles using OM651.924 engine list:

Engine OM651.924

Symptoms:
- Rough idling and loss of power
- Excessive smoke from exhaust (black or white)
- Engine warning light illuminated
- Increased fuel consumption
- Difficulty starting or misfires

Diagnosis:
- Check for clogged or faulty diesel particulate filter (DPF), especially in BlueEFFICIENCY models
- Inspect turbocharger for wear or failure causing boost loss
- Test fuel injectors for leaks or poor spray pattern
- Examine EGR (Exhaust Gas Recirculation) valve for clogging or malfunction
- Scan engine control unit (ECU) for fault codes related to sensors or emissions systems

Fixes:
- Clean or replace DPF if regeneration fails or filter is blocked
- Repair or replace faulty turbocharger components to restore boost pressure
- Replace damaged or leaking fuel injectors to ensure proper combustion
- Clean or replace EGR valve to prevent carbon buildup and restore airflow
- Update ECU software if available to improve engine management and emissions control
- Regular oil and filter changes using manufacturer-recommended specifications to prevent internal wear

Prevention:
- Use high-quality diesel fuel and additives to reduce injector and DPF contamination
- Perform regular maintenance including timely oil changes and air filter replacements
- Avoid frequent short trips that prevent DPF regeneration; allow engine to reach operating temperature
- Monitor engine warning lights promptly and address issues early to prevent damage
- Follow manufacturer service intervals for fuel system cleaning and emissions component checks

By adhering to these diagnostic steps, fixes, and preventive measures, owners of vehicles equipped with the OM651.924 engine can maintain reliable performance and minimize common issues related to this powerplant.